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Yujin Oh 1 Article
Impact of Changes in Maternal Age and Parity Distribution on the Increasing Trends in the Low Birth Weight and Very Low Birth Weight Rates in South Korea, 2005-2015
Yujin Oh, Jisuk Bae
J Prev Med Public Health. 2019;52(2):123-130.   Published online March 14, 2019
DOI: https://doi.org/10.3961/jpmph.18.247
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AbstractAbstract AbstractSummary PDF
Objectives
The aim of this study was to evaluate the impact of shifts in maternal age and parity on the increasing trends in the low birth weight (LBW) and very low birth weight (VLBW) rates from 2005 to 2015 in South Korea.
Methods
Data from 4 993 041 live births registered with Statistics Korea during the period between 2005 and 2015 were analyzed. Applying a modified standardization method, we partitioned the total increment in the LBW and VLBW rates into (1) the increase in the LBW and VLBW rates due to changes in the maternal age and parity distribution (AP-dis) and (2) the increase due to changes in the age-specific and parity-specific rates (AP-spe) of LBW and VLBW for singleton and multiple births, respectively.
Results
During the study period, the total increment in the LBW and VLBW rates was 1.43%p and 0.25%p, respectively. Among singleton births, changes in the AP-dis accounted for 79% (0.34%p) and 50% (0.06%p) of the total increment in the LBW and VLBW rates, respectively. Meanwhile, among multiple births, changes in the AP-dis did not contribute to the increase in the LBW and VLBW rates, with 100% of the increase in the LBW (1.00%p) and VLBW (0.13%p) rates being attributed to changes in the AP-spe.
Conclusions
This study demonstrated that shifts in maternal age and parity were prominent contributors to the increase in the LBW and VLBW rates among singleton births between 2005 and 2015 in South Korea.
Summary
Korean summary
우리나라 출생자료를 이용하여 2005년부터 2015년까지 한국인 저출생체중아 및 극소저출생체중아 발생률 증가에서 1) 산모연령 및 출산순위 분포변화에 기인하는 부분과 2) 이들 분포변화 이외의 요인에 기인하는 부분을 수정된 표준화법을 적용하여 평가하였다. 분석 결과, 단태아에서 저출생체중아 발생률 증가량의 79% (0.34%p), 극소저출생체중아 발생률 증가량의 50% (0.06%p)가 산모연령 및 출산순위 분포변화에 기인한 것으로 나타났다. 반면, 다태아에서는 저출생체중아 및 극소저출생체중아 발생률 증가량의 100% (저출생체중아 1.00%p, 극소저출생체중아 0.13%p)가 이들 분포변화 이외의 요인에 기인한 것으로 나타났다.

Citations

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JPMPH : Journal of Preventive Medicine and Public Health